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A large, flat clay interlocking tile, the Double HP20 has a thin, tapered leading edge. The slate colour tile can be specified as an economical natural alternative to man-made and other slates. This product whilst being large format has the appearance of a small module interlocking slate or tile coupled with low pitch suitability.

Dry fixing is recommended at ridges, hips and verges. A wide range of matching accessories is available to complete a traditional roof design, including ventilating tiles.

Features/ Benefits:

  • Unique natural colour range.
  • Large module for economical coverage 9.5 tiles per m².
  • Large tile for economical coverage.
  • Variable gauge for ease of installation.
  • Range of compatible fittings.
  • Complete dry roof solution available.
  • Natural product - silicone free.
  • Low pitch suitability: minimum pitch 17.5°.
  • Compatibility with Imerys PVt modules.
  • Comprehensive 30 year guarantee (subject to terms and conditions).

Related literature

The following content references this product:

Standard product features


330 x 460 mm.

Effective width:

420 mm.

Covering capacity:

9.5 per m².


4.3 kg per tile; 41 kg/m².



Imerys site specific recommendations calculated to ensure compliance with the requirements of BS 6399-2:1997 and BS 5534:2003 can be provided on request, contact Imerys for more details.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-80-90/324 Clay tiles interlocking

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying





+44 (0)7584 228806

Product reference

209 Imerys Double HP20


[Burnt Red (034)]
[Slate (011)]
[Vallée de Chevreuse (026)]
[Terre de Beauce (099)]

Manufacturer details

8 Kings Mill Rd,
East Yorkshire, YO25 6TT
Tel +44 (0)7584 228806
NBS Plus